The Study On The Influence Of The Wind Farm Connected To The Distribution Network And Its Countermeasures

Because of its renewable energy, no pollution, energy, and wide prospect, wind energy becomes the fastest renewable energy of the world. With the development of wind power technology and the coordinated development of wind power and smart grid construction, it is expected that wind power will become more and more indispensable in the distribution network. However, the power supply of the wind farm is increasingly permeable to the power network, and has brought many aspects to the modern power system. Therefore, it is of great significance to study the impact of the wind power and its countermeasures on the distribution network.This thesis first introduces the current research of wind farms on the background and significance of the impact of power grid. On the current domestic and foreign wind power research and development status are introduced. A brief analysis of the integration of wind power impact on the power system.From the generation principle and the structure and application advantages and disadvantages, introduces the current domestic use more common of the three wind generator, and carried on the deep structure and electrical characteristics of research for doubly fed wind power generator. On the basis of established based on variable speed constant frequency doubly fed wind power generator in power flow calculation of accurate model, and further put forward the simplified model.The used in distribution network power flow calculation method, and focuses on the analysis based on forward and backward substitution method of load flow calculation method is put forward based on forward and backward substitution method of power flow algorithm. And for the different wind power units, the wind power distribution network in the power flow calculation model is processed, and the power flow calculation method for the distribution network with wind power is proposed.From the access capacity and access point of the wind farm, the mechanism of the impact of wind farm access to the distribution network loss is studied. The mechanism of the influence of the power factor of the wind farm and the power factor of the wind turbine and the access point to the voltage of the distribution network after the wind farm is also studied. And based on the steady state model, through the MATLAB software, it is simulated and analyzed.Through the above research analysis, has carried on the brief survey from the wind maximum access capacity, access locations and wind turbine selection strategy to respond to the impact of grid connected wind power on the grid. And for the maximum access capacity of wind farm, an improved particle swarm optimization algorithm is proposed.